Non-universal gauge boson $Z^{\prime }$ and the spin correlation of top quark pair production at $e^{-}{e}^{+}$ colliders

Abstract

In the off-diagonal basis, we discuss the contributions of the non-universal gauge boson $Z^{\prime }$ predicted by the topcolor-assisted technicolor ($TC2$) model to the spin configurations and the spin correlation observable of the top quark pair production via the process $e^{-}{e}^{+}\to t\bar{t}$. Our numerical results show that the production cross sections for the like-spin states, which vanish in the standard model, can be significantly large as $M_{Z^{\prime }}\approx \sqrt{S}$. With reasonable values of the $Z^{\prime }$ mass $M_{Z^{\prime }}$ and the coupling parameter $k_1$, $Z^{\prime }$ exchange can generate large corrections to the spin correlation observable.

16 pages, 5 figures

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• Generalized top-spin analysis and new physics in $e^{+}{e}^{-}$ collisions with beam polarization
• Technicolor corrections to b\bar{b} -> W^{\pm}π^{\mp}_t at the CERN Large Hadron Collider
• Searches for the technicolor signatures via gg --> W^{\pm}π_t^{\mp} at the Large Hadron Collider